The inhibition of API 5L X-52 steel corrosion in acidic medium by moxifloxacin at 303 K, 313 K and 323 K was monitored by potentiodynamic polarization measurement. The concentration of acid medium was maintained throughout the experiment. The inhibition efficiency was found to increased with increase in concentration of moxifloxacin and temperature. The activation energy, adsorption and thermodynamic parameters were evaluated from the study temperature. The moxifloxacin is brought about decrease in its activation energy Ea reflecting Chemisorptions, the adsorption of the moxifloxacin on the steel surface was found to obeyed Langmuir adsorption isotherm. ΔGads values indicated strong and spontaneous adsorption of the moxifloxacin on the surface of API 5L X-52 steel.
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